Dynamical Systems Seminar – Tresnia Berah (Imperial)
Tue 1 Dec · 13:00
Huxley Building, South Kensington Campus
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Tresnia Berah will present a seminar on selection principles for quasi-stationary distributions and reinforcement processes at the Huxley Building on 1 December 2026. The talk will explore the behaviour of a reinforced process governed by a sub-Markov matrix. Attendance is free.
Speaker : Tresnia Berah Title : Selection principles for quasi-stationary distributions and reinforcement processes Abstract : (https://arxiv.org/abs/2606.25857) Let P be a sub-Markov matrix on a finite set S. We study a reinforced process that evolves according to P until absorption and is then resurrected at a point sampled from its weighted past occupation measure ??, with positive weights w? and cumulative weights W? = w? + ? + w?. Whereas the irreducible case leads to almost sure convergence towards the unique quasi-stationary distribution (QSD), we consider reducible kernels, for which several QSDs may coexist. Under generic assumptions on P and suitable assumptions on the weights and initial condition, there are finitely many QSDs and the asymptotic selection is governed by the summability of 1/W?. If the series ? 1/W? diverges, then ?? converges almost surely towards the QSD associated with the largest Perron value. If the series converges, then ?? converges almost surely towards a QSD, and each QSD is selected with positive probability. For polynomial weights w? = 1 and w? = k^q for k ? 1, the first regime corresponds to ?1 ? q ? 0 and the second to q > 0.
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Frequently asked questions
Dynamical Systems Seminar – Tresnia Berah (Imperial) takes place on Tuesday, 1 December 2026 at 13:00.
Dynamical Systems Seminar – Tresnia Berah (Imperial) is held at Huxley Building, South Kensington Campus in London (145, Huxley Building, SW7 2AZ).
Entry to Dynamical Systems Seminar – Tresnia Berah (Imperial) is free.
Yes — hotels within walking distance of Huxley Building, South Kensington Campus can be compared using the accommodation search further down this page.
Tickets for Dynamical Systems Seminar – Tresnia Berah (Imperial) can be booked via imperial.ac.uk using the "Check Tickets & Live Prices" button on this page, which opens the official booking site in a new tab.
Editorial summaryAbout this event
Tresnia Berah will present a seminar on selection principles for quasi-stationary distributions and reinforcement processes at the Huxley Building on 1 December 2026. The talk will explore the behaviour of a reinforced process governed by a sub-Markov matrix. Attendance is free.
This summary was automatically generated from event data sourced from official ticketing providers.
Speaker : Tresnia Berah Title : Selection principles for quasi-stationary distributions and reinforcement processes Abstract : (https://arxiv.org/abs/2606.25857) Let P be a sub-Markov matrix on a finite set S. We study a reinforced process that evolves according to P until absorption and is then resurrected at a point sampled from its weighted past occupation measure ??, with positive weights w? and cumulative weights W? = w? + ? + w?. Whereas the irreducible case leads to almost sure convergence towards the unique quasi-stationary distribution (QSD), we consider reducible kernels, for which several QSDs may coexist. Under generic assumptions on P and suitable assumptions on the weights and initial condition, there are finitely many QSDs and the asymptotic selection is governed by the summability of 1/W?. If the series ? 1/W? diverges, then ?? converges almost surely towards the QSD associated with the largest Perron value. If the series converges, then ?? converges almost surely towards a QSD, and each QSD is selected with positive probability. For polynomial weights w? = 1 and w? = k^q for k ? 1, the first regime corresponds to ?1 ? q ? 0 and the second to q > 0.
Description supplied by the event organiser.
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Hotels within walking distance of Huxley Building, South Kensington Campus. Searching near 145, Huxley Building, SW7 2AZ; check-in Tuesday, 1 December 2026.
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WhereHuxley Building, South Kensington Campus
Before you goFrequently asked questions
When is Dynamical Systems Seminar – Tresnia Berah (Imperial)?
Dynamical Systems Seminar – Tresnia Berah (Imperial) takes place on Tuesday, 1 December 2026 at 13:00.
Where is Dynamical Systems Seminar – Tresnia Berah (Imperial) taking place?
Dynamical Systems Seminar – Tresnia Berah (Imperial) is held at Huxley Building, South Kensington Campus in London (145, Huxley Building, SW7 2AZ).
How much are tickets for Dynamical Systems Seminar – Tresnia Berah (Imperial)?
Entry to Dynamical Systems Seminar – Tresnia Berah (Imperial) is free.
Is there anywhere to stay near Dynamical Systems Seminar – Tresnia Berah (Imperial)?
Yes — hotels within walking distance of Huxley Building, South Kensington Campus can be compared using the accommodation search further down this page.
How do I get tickets for Dynamical Systems Seminar – Tresnia Berah (Imperial)?
Tickets for Dynamical Systems Seminar – Tresnia Berah (Imperial) can be booked via imperial.ac.uk using the "Check Tickets & Live Prices" button on this page, which opens the official booking site in a new tab.
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145, Huxley Building, SW7 2AZ
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